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vtm-android-example/src/org/oscim/android/test/ReverseGeocodeActivity.java
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| /* | ||
| * Copyright 2017 devemux86 | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify it under the | ||
| * terms of the GNU Lesser General Public License as published by the Free Software | ||
| * Foundation, either version 3 of the License, or (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but WITHOUT ANY | ||
| * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A | ||
| * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License along with | ||
| * this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.oscim.android.test; | ||
|
|
||
| import android.app.AlertDialog; | ||
| import android.content.Intent; | ||
| import android.os.Bundle; | ||
| import android.view.Menu; | ||
|
|
||
| import org.oscim.backend.CanvasAdapter; | ||
| import org.oscim.core.GeoPoint; | ||
| import org.oscim.core.GeometryBuffer; | ||
| import org.oscim.core.MercatorProjection; | ||
| import org.oscim.core.Point; | ||
| import org.oscim.core.Tag; | ||
| import org.oscim.core.Tile; | ||
| import org.oscim.event.Gesture; | ||
| import org.oscim.event.GestureListener; | ||
| import org.oscim.event.MotionEvent; | ||
| import org.oscim.layers.Layer; | ||
| import org.oscim.layers.TileGridLayer; | ||
| import org.oscim.map.Map; | ||
| import org.oscim.tiling.source.mapfile.MapDatabase; | ||
| import org.oscim.tiling.source.mapfile.MapReadResult; | ||
| import org.oscim.tiling.source.mapfile.PointOfInterest; | ||
| import org.oscim.tiling.source.mapfile.Way; | ||
| import org.oscim.utils.GeoPointUtils; | ||
|
|
||
| import java.util.List; | ||
|
|
||
| /** | ||
| * Reverse Geocoding with long press. | ||
| * <p/> | ||
| * - POI in specified radius.<br/> | ||
| * - Ways containing touch point. | ||
| */ | ||
| public class ReverseGeocodeActivity extends MapsforgeMapActivity { | ||
|
|
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| private static final int TOUCH_RADIUS = 32 / 2; | ||
|
|
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| @Override | ||
| protected void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
|
|
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| // Map events receiver | ||
| mMap.layers().add(new MapEventsReceiver(mMap)); | ||
| } | ||
|
|
||
| @Override | ||
| public boolean onCreateOptionsMenu(Menu menu) { | ||
| return false; | ||
| } | ||
|
|
||
| @Override | ||
| protected void onActivityResult(int requestCode, int resultCode, Intent intent) { | ||
| super.onActivityResult(requestCode, resultCode, intent); | ||
|
|
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| if (requestCode == SELECT_MAP_FILE) { | ||
| // For debug | ||
| TileGridLayer gridLayer = new TileGridLayer(mMap, getResources().getDisplayMetrics().density); | ||
| mMap.layers().add(gridLayer); | ||
| } | ||
| } | ||
|
|
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| private class MapEventsReceiver extends Layer implements GestureListener { | ||
|
|
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| MapEventsReceiver(Map map) { | ||
| super(map); | ||
| } | ||
|
|
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| @Override | ||
| public boolean onGesture(Gesture g, MotionEvent e) { | ||
| if (g instanceof Gesture.LongPress) { | ||
| GeoPoint p = mMap.viewport().fromScreenPoint(e.getX(), e.getY()); | ||
|
|
||
| // Read all labeled POI and ways for the area covered by the tiles under touch | ||
| float touchRadius = TOUCH_RADIUS * CanvasAdapter.dpi / CanvasAdapter.DEFAULT_DPI; | ||
| long mapSize = MercatorProjection.getMapSize((byte) mMap.getMapPosition().getZoomLevel()); | ||
| double pixelX = MercatorProjection.longitudeToPixelX(p.getLongitude(), mapSize); | ||
| double pixelY = MercatorProjection.latitudeToPixelY(p.getLatitude(), mapSize); | ||
| int tileXMin = MercatorProjection.pixelXToTileX(pixelX - touchRadius, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| int tileXMax = MercatorProjection.pixelXToTileX(pixelX + touchRadius, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| int tileYMin = MercatorProjection.pixelYToTileY(pixelY - touchRadius, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| int tileYMax = MercatorProjection.pixelYToTileY(pixelY + touchRadius, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| Tile upperLeft = new Tile(tileXMin, tileYMin, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| Tile lowerRight = new Tile(tileXMax, tileYMax, (byte) mMap.getMapPosition().getZoomLevel()); | ||
| MapReadResult mapReadResult = ((MapDatabase) mTileSource.getDataSource()).readLabels(upperLeft, lowerRight); | ||
|
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| StringBuilder sb = new StringBuilder(); | ||
|
|
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| // Filter POI | ||
| sb.append("*** POI ***"); | ||
| for (PointOfInterest pointOfInterest : mapReadResult.pointOfInterests) { | ||
| Point layerXY = new Point(); | ||
| mMap.viewport().toScreenPoint(pointOfInterest.position, false, layerXY); | ||
| Point tapXY = new Point(e.getX(), e.getY()); | ||
| if (layerXY.distance(tapXY) > touchRadius) { | ||
| continue; | ||
| } | ||
| sb.append("\n"); | ||
| List<Tag> tags = pointOfInterest.tags; | ||
| for (Tag tag : tags) { | ||
| sb.append("\n").append(tag.key).append("=").append(tag.value); | ||
| } | ||
| } | ||
|
|
||
| // Filter ways | ||
| sb.append("\n\n").append("*** WAYS ***"); | ||
| for (Way way : mapReadResult.ways) { | ||
| if (way.geometryType != GeometryBuffer.GeometryType.POLY | ||
| || !GeoPointUtils.contains(way.geoPoints[0], p)) { | ||
| continue; | ||
| } | ||
| sb.append("\n"); | ||
| List<Tag> tags = way.tags; | ||
| for (Tag tag : tags) { | ||
| sb.append("\n").append(tag.key).append("=").append(tag.value); | ||
| } | ||
| } | ||
|
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| AlertDialog.Builder builder = new AlertDialog.Builder(ReverseGeocodeActivity.this); | ||
| builder.setIcon(android.R.drawable.ic_menu_search); | ||
| builder.setTitle(R.string.dialog_reverse_geocoding_title); | ||
| builder.setMessage(sb); | ||
| builder.setPositiveButton(R.string.ok, null); | ||
| builder.show(); | ||
|
|
||
| return true; | ||
| } | ||
| return false; | ||
| } | ||
| } | ||
| } |
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